Yes,:
# cat /etc/modprobe.d/drbd.conf: options drbd minor_count=254
disable_sendpage=1
# cat /sys/module/drbd/parameters/disable_sendpage: Y
Thanks for the reply.
On Wed, Jul 20, 2016 at 07:00:33PM +0100, Trevor Hemsley wrote:
> My first step whenever I see xen and DRBD mentioned in the same sentence
> is to ask if you have disabled sendpage?
>
> echo "options drbd disable_sendpage=1" >> /etc/modprobe.d/drbd.conf
>
> then reload the drbd module.
>
> On 20/07/16 17:34, David Bruzos wrote:
> > Hello all, I'm experiencing some kernel oops when using DRBD. I'm not sure
> > if the root cause of the problem is DRBD, but it appears that DRBD
> > resources are always affected by the oops and I've seen other DRBD related
> > messages on the web that look similar to mine.
> >
> > The system is a Xen dom0 Gentoo system, running kernel 4.4.6, Xen 4.6, ZFS
> > 0.6.5.7 and DRBD 8.4.5. The system runs very well while it is running, but
> > at some unpredictable point in time, it has this problem. The DRBD
> > resource appears to stop working all together when this happens. It is a
> > multi-volume DRBD resource on top of ZFS zvols.
> >
> > * Here is the relevant output from dmesg when the event happens:
> >
> > [260175.411938] BUG: unable to handle kernel NULL pointer dereference at
> > 0000000000000028
> > [260175.411992] IP: [<ffffffff813fb602>] __memcpy+0x12/0x20
> > [260175.412026] PGD 40145f067 PUD 404ede067 PMD 0
> > [260175.412054] Oops: 0000 [#1] SMP
> > [260175.412074] Modules linked in: xt_physdev br_netfilter iptable_filter
> > ip_tables x_tables xen_pciback xen_netback xen_blkback xen_gntalloc
> > xen_gntdev xen_evtchn xenfs xen_privcmd binfmt_misc drbd lru_cache
> > openvswitch nf_defrag_ipv6 nf_conntrack bridge stp llc bonding ipmi_si
> > ipmi_devintf ipmi_msghandler crct10dif_pclmul crc32_pclmul snd_pcm
> > snd_timer mgag200 snd ttm soundcore drm_kms_helper pcspkr drm
> > amd64_edac_mod fb_sys_fops edac_mce_amd syscopyarea sysfillrect sysimgblt
> > k10temp edac_core fam15h_power ixgbe sp5100_tco i2c_piix4 uas joydev vxlan
> > ip6_udp_tunnel udp_tunnel mdio input_leds usbkbd usbmouse 8250_fintek
> > shpchp fjes dm_zero dm_thin_pool dm_persistent_data dm_bio_prison
> > dm_service_time dm_round_robin dm_queue_length dm_multipath
> > dm_log_userspace dm_flakey dm_delay xts aesni_intel lrw gf128mul
> > [260175.412499] glue_helper ablk_helper cryptd aes_x86_64 iscsi_tcp
> > libiscsi_tcp libiscsi scsi_transport_iscsi vmxnet3 virtio_net virtio_ring
> > virtio tg3 sky2 r8169 pcnet32 mii igb ptp pps_core dca i2c_algo_bit e1000
> > bnx2 atl1c fuse zfs(PO) zunicode(PO) zcommon(PO) znvpair(PO) spl(O)
> > zavl(PO) nfs lockd grace sunrpc fscache jfs reiserfs btrfs ext2 multipath
> > linear raid0 dm_mirror dm_region_hash dm_log firewire_core crc_itu_t
> > hid_sunplus hid_sony hid_samsung hid_pl hid_petalynx hid_monterey
> > hid_microsoft hid_logitech_dj hid_logitech ff_memless hid_gyration
> > hid_ezkey hid_cypress hid_chicony hid_cherry hid_belkin hid_apple
> > hid_a4tech sl811_hcd hid_generic usbhid usb_storage hid aic94xx libsas lpfc
> > qla2xxx megaraid_sas megaraid_mbox megaraid_mm megaraid aacraid sx8 DAC960
> > hpsa cciss 3w_9xxx 3w_xxxx 3w_sas
> > [260175.412933] mptsas mptfc scsi_transport_fc mptspi mptscsih mptbase
> > atp870u dc395x qla1280 imm parport dmx3191d sym53c8xx gdth advansys initio
> > BusLogic arcmsr aic7xxx aic79xx scsi_transport_spi pdc_adma sata_inic162x
> > sata_mv sata_qstor sata_vsc sata_uli sata_sis sata_sx4 sata_nv sata_via
> > sata_svw sata_sil24 sata_sil sata_promise pata_sl82c105 pata_via
> > pata_jmicron pata_marvell pata_netcell pata_pdc202xx_old pata_triflex
> > pata_atiixp pata_opti pata_amd pata_ali pata_it8213 pata_ns87415
> > pata_ns87410 pata_serverworks pata_platform pata_cypress pata_oldpiix
> > pata_artop pata_it821x pata_optidma pata_hpt3x2n pata_hpt3x3 pata_hpt37x
> > pata_hpt366 pata_cmd64x pata_efar pata_rz1000 pata_sil680 pata_radisys
> > pata_pdc2027x pata_mpiix
> > [260175.413309] CPU: 0 PID: 8884 Comm: drbd_w_vm_ex13- Tainted: P
> > O 4.4.6-gentoo-xen0u #3
> > [260175.413349] Hardware name: Supermicro AS -2022G-URF4+/H8DGU-LN4, BIOS
> > 3.5a 09/25/2015
> > [260175.413387] task: ffff880415861b00 ti: ffff88034b964000 task.ti:
> > ffff88034b964000
> > [260175.413420] RIP: e030:[<ffffffff813fb602>] [<ffffffff813fb602>]
> > __memcpy+0x12/0x20
> > [260175.413458] RSP: e02b:ffff88034b967ad0 EFLAGS: 00010246
> > [260175.413482] RAX: ffff880402e94948 RBX: 0000000000000028 RCX:
> > 0000000000000002
> > [260175.413514] RDX: 0000000000000000 RSI: 0000000000000028 RDI:
> > ffff880402e94948
> > [260175.413546] RBP: ffff88034b967b08 R08: 00000000000006c0 R09:
> > ffff88041b401400
> > [260175.413577] R10: ffff88041b401400 R11: 0000000000000000 R12:
> > ffff88034b967c28
> > [260175.413609] R13: 0000000000000010 R14: 0000000000000010 R15:
> > ffff88034b967c38
> > [260175.413648] FS: 00007fd9fffff700(0000) GS:ffff88041f800000(0000)
> > knlGS:0000000000000000
> > [260175.413685] CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b
> > [260175.413712] CR2: 0000000000000028 CR3: 0000000404edf000 CR4:
> > 0000000000040660
> > [260175.413746] Stack:
> > [260175.413757] ffffffff813fff95 ffff880402e94958 ffff8803e9128f00
> > ffff880365629800
> > [260175.413797] 0000000000000028 000000000000fe88 ffff88034b967c18
> > ffff88034b967ba8
> > [260175.413836] ffffffff8179ef25 ffffffff0000fe88 ffff8804158623a0
> > 0000000000000003
> > [260175.413874] Call Trace:
> > [260175.413892] [<ffffffff813fff95>] ? copy_from_iter+0x1f5/0x260
> > [260175.413923] [<ffffffff8179ef25>] tcp_sendmsg+0x605/0xaf0
> > [260175.413951] [<ffffffff817c9c45>] inet_sendmsg+0x65/0xa0
> > [260175.415401] [<ffffffff817340a5>] kernel_sendmsg+0x35/0x50
> > [260175.416848] [<ffffffffa0f5f8b1>] drbd_send+0xe1/0x200 [drbd]
> > [260175.418262] [<ffffffffa0f5fa79>] __send_command.isra.37+0xa9/0x1d0
> > [drbd]
> > [260175.419674] [<ffffffffa0f617a6>] drbd_send_dblock+0x286/0x640 [drbd]
> > [260175.421063] [<ffffffffa0f57155>] ? mod_rq_state+0x355/0x610 [drbd]
> > [260175.422431] [<ffffffff810c1981>] ?
> > __raw_callee_save___pv_queued_spin_unlock+0x11/0x20
> > [260175.423812] [<ffffffffa0f46f57>] w_send_dblock+0x97/0x1d0 [drbd]
> > [260175.425196] [<ffffffffa0f48358>] drbd_worker+0xf8/0x3a0 [drbd]
> > [260175.426556] [<ffffffffa0f5dde0>] ? drbd_destroy_connection+0xf0/0xf0
> > [drbd]
> > [260175.427895] [<ffffffffa0f5de2b>] drbd_thread_setup+0x4b/0x120 [drbd]
> > [260175.429213] [<ffffffffa0f5dde0>] ? drbd_destroy_connection+0xf0/0xf0
> > [drbd]
> > [260175.430500] [<ffffffff810984b8>] kthread+0xd8/0xf0
> > [260175.431756] [<ffffffff810983e0>] ? kthread_park+0x60/0x60
> > [260175.432983] [<ffffffff818514cf>] ret_from_fork+0x3f/0x70
> > [260175.434180] [<ffffffff810983e0>] ? kthread_park+0x60/0x60
> > [260175.435347] Code: 75 05 e8 72 fb ff ff 48 8b 43 60 48 2b 43 50 88 43 4e
> > 5b 5d f3 c3 90 90 90 0f 1f 44 00 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07
> > <f3> 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 f3
> > [260175.437792] RIP [<ffffffff813fb602>] __memcpy+0x12/0x20
> > [260175.438946] RSP <ffff88034b967ad0>
> > [260175.440060] CR2: 0000000000000028
> > [260175.445188] ---[ end trace 004a8764b1dc737d ]---
> > [260209.881238] block drbd45: Remote failed to finish a request within
> > ko-count * timeout
> > [260209.882461] drbd vm_ex13-2: peer( Secondary -> Unknown ) conn(
> > Connected -> Timeout ) pdsk( UpToDate -> DUnknown )
> >
> >
> > Thanks a lot! Please help!
> >
> > David
> > _______________________________________________
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> > [email protected]
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> >
> > ______________________________________________________________________
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>
>
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